John l



(No Model.) 2 Sheets-Sheet 1.

J. L. LONGSTRETH.

FEED WATER APPARATUS.

N0. 328,3Z5. Patented Oct. 13,1885.

N E S e Q 1 i/IW- WM;

I UNITED STATES (PATENT OFFICE.

JOHN L. LONGSTRETH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF THREEFOURTHS TO HOWARD B. FRENCH, OF SAME PLACE, AND SAMUEL H. FRENCH AND WILLIAM A. FRENCH, OF HADDON TOWNSHIP, CAMDEN COUNTY, NEW JERSEY.

FEED-WATER APPARATUS.

SPECIFICATION forming part of Letters Patent No. 328,325, dated October 13,1885. Application filed July 23, 1885. Serial No. 172,382. (No model.)

To all whom it may concern.-

Be it known that I, J OHN L. LONGSTRETE, a citizen of the United States, residing at Philadelphia, Pennsylvania, have invented certain Improvements in Exhaust-Steam Feed-Water Apparatus, of which the following is a specification.

The object of my invention is to prevent the escape of any of the water of condensation with the exhaust-steam from the discharge-pipe of the engine and to return said water of condensation and part of the exhaust-steam, if desired, to the boiler, either alone or in connection with the cold-water supply.

1 5 In the accompanying drawings, Figure l is a side View of a steam-engine with a feed-water heater and circulating apparatus constructed in accordance with my invention, and Fig. 2 a plan view of the heater and circulating apparatus. Figs. 3 and 4 represent modifications of my invention.

A represents the cylinder of a steam-engine, and B the exhaust-pipe of the same, the latter communicating with the casing D, in which is arranged the coil of pipes for the circulation of the feed-water, the outlet end a of this coil being in communication with the boiler, and the inlet end I) of the coil communicating with the pump F, the plunger of which is in the 0 present instance operated from the cross-head of the engine by means of connecting rods and levers, which, however, form no essential part of my invention, as the pump may be operated in any desired manner without departing 5 from the main feature of the invention.

The exhaust-steam escapes from the casing D through the pipe G, which communicates with the discharge-branch H,and has a returnbend, I, so that the water of condensation will 0 not be driven out through the pipe H, but will return through this bend, which communicates through a pipe, 01, with the pump F. The

pipe d has a check-valve, f, and a stop-valve, g, the check-valve serving to prevent back flow through the pipe (2, and the stop-valve serving to regulate or cut ofi the forward flow, as circumstances may suggest.

With the pipe d communicates a pipe, h, which derives a supply of water from any adjacent reservoir or hydrant, and is provided with a stop-valve, 0%, whereby the flow through the pipe may be regulated or cut off, as desired.

By means of this circulating system backpressure on the piston of the engine is prevented or a partial vacuum behind the piston 5 produced, and the waterof condensation is returned to the pump F and forced through the pipe b into the heating-coil in the casing D, and thence to the boiler as feed-water, any desired amount of cold water being admitted to the pipe d from the pipe h to maintain the necessary volume. A portion of the exhauststeam may be drawn into the pump with the water of condensation, this exhaust-steam passing with the water of condensation through the heater to the boiler, or being condensed or partly condensed by the jet from the pipe h when the valve in the latter is opened, so that the initial temperature of the feed-water entering the coil in the casing D is such that its temperature on leaving the coil will closely approach that of the exhaust-steam.

If desired, the water of condensation and exhaust-steam may be controlled by a separate pump and returned to the boiler inde- 7 pendently of the feed passing through the heater, as shown in Fig. 3, or the heater may be dispensed with, the water of condensation, exhaust-steam, and water from the pipe h being forced by the pump F directly into the boiler. (See Fig. 4.)

I am aware that it is not new to pump feedwater through a casing containing tubes through which a portion of the exhaust-steam is caused to pass for the purpose of heating 8 5 the feed-water; hence this idea broadly I do not claim, but

I claim as my invention- 1.- The combination of the exhaust-pipe of the engine, the discharge-branch, and the feed- 0 pump with the pipe G, communicating with said discharge-branch and having a returnbend communicating with the feed-pump, as specified.

2. The combination of the feed-Waterheater and the exhaust-pipe communicating therewith with the discharge-branch, the feedpump, and the outletpipe G, communicating with the heater and dischargebranch and having a return-bend communicating with the fced-pump, as set forth.

3. The combination of the eXhaust-pipe,discharge-branch, and feed-pump with the outlet-pipe communicating with the dischargebranch and having a return-bend communicating with the feed-pump and the cold-Water supply-pipe h, as specified.

4. The combination of the eXhaust-pipe,dis charge-branch, and feed-pump with the out- 15 let-pipe communicating with the dischargebranch and having a return-bend, I, and a pipe, 01, communicating with the feed-pump and having a check-Valve, f, as specified.

In testimony WhereofIhave signed my name 20 to this specification in the presence of two subscribing Witnesses. v

JOHN L. LON GSTRETH. Witnesses:

JOHN E. PARKER, HARRY SMITH. 

